Classification
320 - Political science
380 - Commerce, communications & transportation
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
5
330 - Economics
5
333 - Economics of land & energy
5
363 - Other social problems & services
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
900 - History & geography
2
100 - Philosophy & psychology
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
780 - Music
1
800 - Literature & rhetoric
1